Automatic air-pressure gauge



H'. w. BANKS.

AUTOMATIC Am PRESSURE GAUGE.

APPLICATION FILED 'Y Patented Nov. 14,1922.,

APR. 20| 1920.

Fatenteoi Nov. ld, i922.

HASKELL W. BANKS,y QF SAN .'DIIEGO,` CALIFORNIA.

AUTOMATIC AIR-PRESSUR GAUGE.

Appiication sied Aprn 2o, 192m s'era1jivo.375,3sr: y

To all whom t muy concern: y

Be it known that I, HAsKELL lll. BANKS, a citizen of the United States, residing at San Diego, in the county of San Diegoand State of California, have invented new and useful improvements in Automatic Air-Pressure Gauges, of which the following is a speci-y cation. y

This invention is an automatic pressure gauge particularly adapted to be employed in connection with the air line used for lilling a pneumatic tire.

It is an object of the'invention to provide a gauge having improved means for relieving the pressure within the air line when an adjusted predetermined pressure has been obtained in the tire. n

It is a further object of the invention to provide a gauge of this character which may form a part ofthe illing nozzle of the air line and one in which usual spring construe-vy tions are replaced by an adjustable weight, thereby obtaining amore 'accurate adjustment and a moreV positive action in the gauge.

Further objects of the invention willbe understood from the following description ofthe accompanying drawings in which;

Figure l is a top plan view of the invention applied to a usual filling nozzle.

F ig. 2 is a vertical longitudinal section through the same.v

Fig. 3 `is a longitudinal vertical section through the controlling valve of the gaugeL showing the same in open position.

In the drawings Ihave shown the im-` proved gauge .as applied to and forming a part of the lling nozzle of an airline adapted fory use "for filling pneumatic. tires. It will be obvious, however, that thei improved gauge may be'made separate from f' the fillingnozzle and employed in a variety'.y

ofuseswhere it is desired to'relieve pressure which. exceeds a predetermined maxi-A with the nozzle casing. This. conduit, pref erably, terminates in 'a yreduced notched end 3 over which the end of a usualhose 4;.; is 'adapted' to be received and clamped in.

position by 4any preferred clamping means such as shown at 5.

`The nozzle casingis centrallyl apertured .pas

The'filling nozzle te which the inventionV member is received in the central aperture of j the nozzle casing and is so arranged as, to

` slio'wnl'at- 6, this centralvaperture'commuiii# eating with the conduit 2, Aslidable valve normally close the' aperture through the i nozzle casing and to open the same so as to permit the escape of air therefrom whenv pressure is applied against the end of` the y slidable valve .meinben As anv instance of this arrangement, the slidable valve member is shown yas comprising a valve head 7 normallyseated upon a shoulder 8 formed in the centralV aperture of the nozzle casing, a, leak proof washer 9 being, preferably, in-

.seltedA between the Valve head I and the shoi'ilder.`

` Theairffrom the hose t conduit 2 of the nozzle into thespace surrounding the 'valve'head 7,. and when-the' valvehead is iii its normal closed position it lowsthrougli the i i will prevent the escape ofthe air pastV the p shoulder 8. The valve head is,` preferafoly,y spring-seated upon the shoulder `Sas by'a coilspring l0` positioned between theupper end'of lthe valvefhead and a removable end,

member 11 for the nozzle casing, this removable end member, preferably, having a threaded yengagementlQ in the end kof the'V nozzle casing: and arranged to provide a. tight vclosure so 'that thejair cannot escape through the end of they nozzle casing.

HThe valve head 7 is arranged ated seras tobe unseatedl fromtheshoulder` 8 and permit the escape of air past' said shoulder by anoperating rod 13. extending from the valve head and, preferably, formed integral therewith, through the central aperture of the nozzle casingv to the outer, openf end thereof. A central aperture 14 is pro# videdin the operating rod, said aperture, terminating short of the inner end 4vof the` rod and,.preferably, communicating with thev Lto. be actu- ,i 'i

centralapertur'eof. the illing nozzle sur- Y rounding jthe operating rod las through a transverse communicating port 15. By this.

arrangement it will be seen that when they I valve head 17 is moved from itsfseat the air escaping past shoulder 8 "is .free toowA through the port 15 int-o the central' aperture of the operating rod.

lOO

`The outer end of the operating rod is pro vided with transverse ports i6 through which the air is thenadapted toflow, being then' arranged to be receivedin-a pneumatic tire throu h theusual valve. The escape et iheir imm the Space termed by the cena 55 25,Lv afwasher28 being` preferably the outer end of the casing to provide a space 18 in which suitable packing means are provided.

F or this purpose an annular collar 1,9 may he provided uponthe operatingrod; the col-y lar being received within the space 18 and a suitable packing washery 2O being provided l5 between the collar and the' nozzle casing, and a similar washer 21 being positioned at the outer face of the collar 19. This latterI washer may be held in place by a sleeve 22 having a threaded engagement 23 over theV outer end of the nozzle casing and being provided at its vouter end with anV inwardly turned lip 2li resting against the washer 21. As previously stated, the valvehead 7 and the operating rod carried thereby are 111er! 25 mally yieldahly held in position with the valve head seated. The washers 9, 2O land 21am, preferably, of such resiliency aslto permit a slight inward movement'of thefop` erating rod and the valve head carried there by when the end of the filling nozzleis` forced i down over the end of the valve of ap'iieumv matic tire, the valve stemvof: this valve im.'

pinging against the' end of the dperatingrod' to force the latter inwardly in the usual manner. Under these conditions thevalve head will be unseated and airisv thenl free to flow through theV ports llrin the operating' rod into the valve of they pneumatic tire.

rMea-ns are provided for permitting the 40 escape to the atmosphere ofthe air under pressure within the nozzle when the air pressureinthe tire being filled hasj reacheda predetermined pressure. For thispurpose a.

second conduit 25extends laterally from the', casing of the filling nozzle, the casing' of this conduit also, preferably; being formed in tegral with the casing of the lling nozzle'.

The inner end of theconduit 25 communi` Cates with the air space surrounding the operating rod of the filling nozzle, and lthe outer end of this conduit communicates with afvalveV chamber 26. y valvef27 provided in the valve 'chamberand innormal'` cles-ed position :closes the fend' of the coiifudiiit @this @1i-d;bfthvalvel fh moved away from' the'conduit'25A itif' '=f"a 'r ,ranged to open said conduitto theatinos phere. Y y s c For this pui'posea longitudinal aperture shown in Fig. 3. The opposite'end of the aperture 29 terminates in a transverse port 3() arranged to communicate when the valve 27 is moved to open position with a transverse port 31 provided in the end cap 32 70 adapted-to be received over the end of the casingv for conduit 25 and valve seat 26. The end cap 32 `Amay be secured in position by a threaded engagement 33. y y

A gravity arm :34 is arranged to normally 75 force the valve 27 to its seat'for closingconf duit 25 and to' be moved by' said valve soas to perinit'ui'iseating movement of thev latterV when the pressure ofthe air through conduit. 25 against the valve 27 exceeds the weight of 80 the gravity" arm' 34."

As an instance of this arrangement the' arm Bd'may be pivotally connected tothe end cap 32 as by a ball and so'c'ket'connection` between the arm and end cap. For this purpose the end of the arm't is shown as hemispherical head 35 seated'y in a heinispherical recess 36 provided in the' end cap.I tiie Vouter end of the arm 34; beiiig arranged toswing downwardly bythe force'of grav- 90 ity no matter in` what position the lillingfnozzle' may be held. When the arm Bl-isthus swung downwardly the loweredg'e of the in ner face 37 ofthe head 35V willabut'against the'end of the valve' 27 a's'clearly shovvirin-I 95 Figi 2, to foi'cezthevalve inwardly to its seat` over the endfof conduit'25 thereby closing the valve.' Y

Whom now, the pressure within thetire being" filled reaches a' certain` ainount,' the 100 pressure o'f the air in themaii space' GandI through the conduit 25 against the lend of s valve 27 willoverconive" the resistance ofthe gravity arm Stand the valve 27' kwill be movedoutwardly, the'conta'ct oi-"the valve 105 endagainst the lower edge of'the'h'ead 35 swinging'the arm 34 upwardly to theposition shown inl Fig.' 3 and therebyproviding' suflicient space for the' required longitudinal movement ofthe valve 27 in order to Iplacey 110 portf() in communication withV port' 31: and permit the escape of the air from conduit 25 past the valve head and through aperture 29 and ports 30 yand'31 to' theatmospherelThe iniiation ofthe tire toz any greater pressure is'thus"p'i'eventedand the'v soundof the es; capping air willnotify lthe operator* that the tirelis"suiciently'infatedf 4 Means are, preferably, provided foradl f fthe'gravity arinjflf'so 120 sired pointto cause the escape or' air fromv 3l at lany predete-r-i.

mined pressure. i

l 17,435,272 l a '34 may he provided with suitable gradua-l ltions represented at 40 so that the operator may readily set the" weightfl at any de'-v the nozzle through port Various chan-ges may be made Without departing from the `spirit of the invention fas-y claimed. e

l/Vhat is elaimed is: l'. A device of the character` described comprising a valve movable under pressure to relieve said pressure, and a gravity arm ,having a flat end surfaeeand Convex bear'- ing surface in rear or' lthe* same, said arm being pivoted at. its bearing surlace so that when in normal position the edge of the flat end oit' the armA will .impinge againstsaid valve for yieldably holding the same against the pressure controlled movement, saidarmy being arranged, ata predetermined pressure against said valve, to swing upon its bearing surface against the force of gravity so as to retract the flat end of the arm and thereby i.

permit movement of the valve.

2. A. relief valve comprising a casing hav- 'ing va 'valve chambery open'fa't itsl inner 'end a and 'al sideioutletport, a'l valve "slidinglydlmounted inthe valve chamber and having a port' adapted to-register1vv`itli-the side outlet j oint connection with the valve casing,z andj 'a inner end 'engaging the flat outerend of4 I the valve so thatagwhenlthelarm is'straightI`l`l` the valve is 'openyand' so that when the 'arm' is movedlin any direetionthey edge of the fiat;y j f innert end 'will impinge' against the lat `outer f end of the valveand move valve to yelose'd f i position.

ln testimon'y'vjivhereof\ have signed name to this specifieation.-

yianisirnnri" BANKs; a y

74's, it, 

